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Message: [QUOTE="ClassicIDI, post: 1511715, member: 1330"] well since I'm getting no where with responses here I reached out to my factory ford rep who sent an email to Detroit. The response he got back from an engineer was this. Factory Tuning the truck begins to defuel when temps hit the following EGT's: 1472 Engine oil temp: 257 Engine coolant temp : 225 Fuel rail temp: 176 I have continued driving the truck and towing although not as heavy and still have no codes or check engine lights. While Im not thrilled with these hot temps I have a hard time believing that "there is something wrong" when the truck exhibits no warning signs of any kind. I asked a friend of mine at a ford dealer to check with his diesel techs and the response I got was "no idea we never monitor that while towing" I also have a very good friend thats a tech at ATS and asked him if he'd ever seen a 6.7 melt a piston and the answer was no. I looked on the forums to try and find a melted 6.7 piston and could not find a single one. Ive checked visually for cac tube leaks and exhaust leaks. couldn't find any. truck is regening around 300 intervals. Still curious in others experiences but so far I appear to be the only person monitoring a bone stock truck and even then the guys with tuned and ******d no one really knows. 1250-1350-1450 its all opinion. I know im heavy and I'm pulling at altitude which makes a big difference. [/QUOTE]

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